A SOUTHWESTERX PLANT GROUP. 



79$ 



Northern flora. The gorgeous yellow of Opuniia Rafinesquii 

 and 0. Missouriensis, flourishing on a sandy hillside beneath 

 the July sun, can well inspire the soul of botanist and flower- 



Fig. 6. — Yucca gloriosa. 



lover. It is an interesting and significant fact that among the 

 Rotates., as allies of the Opvntia, we find the two little genera that 



